Mechanics property and adaptability of approach slab;

With the typical geological condition and road filling in Ningbo, the causes for bump at bridge head are analyzed and proposals recommended, using CMC jointly with the approach slab to solve the problem by reducing differential settlement at the abutment.

In this paper, finite element method is employed to analyze the mechanical behaviors of approach slabs between bridge abutment and pavements subject to axle loadings.

In this paper with introduction on the design method of abutment back in China and abroad and based upon the united design principle of bridges, culverts and abutment back the butt strap method is introduced from slope gradient, length, thickness, reinforcement and other aspects.

Considering plate outrunning at bridge head of Jingzhu expressway,sleeve valve pipe grouting technology is put forward.

To solve the phenomenon of highway bridge plate outrunning and falling,it carries on the plasm pouring test by methods of uprightness and plane.

The design project of approach slab in super highway;

Reasonable setting of approach slab and back filling behind abutment;

Simplifying the approach slab as an elastic isotropy rectangular plate simply supported along its four edges and lying on the Winkler viscoelastic foundation,the dynamic response of the approach slab un?der moving vehicle were analyzed by calculus variation.